Harmony of the Spheres, a rebellious asteroid and Planet Nine.
Astronomer Dr Grant Christie joins Graeme Hill to talk the latest in astronomy.
An incidental discovery of an asteroid orbiting the sun in the wrong direction has led scientists to ask questions about its origins. Is this an object from another solar system?
Nature through the laws of gravity means that only certain resonant orbits can exist and they have been converted into musical tones. Dr Christie discusses Harmony of the Spheres with Graeme Hill.
New evidence reveals that Planet Nine might be out there.
Gravitational influence in the distance has led to a hunt-on for the possible planet beyond the Kuiper belt.
Dr Christie describes the massive body as potentially being ten times the mass of the earth.
Listen to the full interview with Dr Grant Christie above.
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